What does the Bible say about the cleansing of sin?

The Bible makes it clear that human efforts and rituals, such as bathing in the muddy Ganges River, cannot wash away sin. According to Hebrews 9:22, without the shedding of blood there is no remission of sins. The only effective cleansing comes through the sacrificial death of Jesus Christ, who bore the sins of His people. 1 John 1:7 states that the blood of Jesus Christ cleanses us from all sin, emphasizing that Christ's sacrifice is the true and effective means of redemption and salvation.